Home
Problems
Submissions
Users
Contests
About
>
Status
Tips
API
Github
Log in
or
Sign up
This site works best with JavaScript enabled.
Problems
«
1
2
...
94
95
96
97
98
99
100
»
Problem search
Full text search
Has editorial
Show problem types
Category
All
---
AAC
ACC
APIO
Balkan OI
Baltic OI
BlueBook
Brazil OI
Bubble Cup
Bulgarian OI
CCC
CCO
CEOI
China NOI
Classics
COCI
CSPC
CTF
Data Structure Tests
DMOPC
DWITE
ECOO
EGOI
ESOI
FHC
Fun Math
GFSSOC
Google Code Jam
Google Hash Code
Google Kick Start
ICPC
IOI
JOI
Mock CCC
Mock CCO
MWC
Olympiads School
POI
SAC Coding Challenge
Seasonal
SIUCF
Taiwan NOI
TLE
TSOC
Uncategorized
VM7WC
WAC
Waterloo Local
Woburn Challenge
YAC
Point range
Go
Random
Hot problems
Educational DP Contest AtCoder I - Coins
Educational DP Contest AtCoder K - Stones
CCC '12 S3 - Absolutely Acidic
DMOPC '20 Contest 4 P1 - Missing Numbers
CCC '21 J3 - Secret Instructions
DWITE '07 R3 #4 - The Convex Fence Company
Wesley's Anger Contest Reject 5 - Two Permutations
Problem
Category
Points
AC %
Users ▾
NOI '02 P5 - New Tetris
China NOI
15p
4.1%
3
Union Laser
Uncategorized
25p
35.0%
3
IOI '97 P4 - Map Labelling
IOI
20p
53.2%
3
ACSL '09 Contest 3 Senior - Pinochle
Uncategorized
10p
34.1%
3
ICPC NEERC 2010 B - Binary Operation
ICPC
20p
20.0%
3
ICPC NEERC 2010 H - Hands of Poker
ICPC
15p
37.5%
3
MMM '14 G - Campfire Cooking
Uncategorized
40p
2.7%
3
MMM '14 H - Lift Control
Uncategorized
25p
71.8%
3
WC '01 P7 - The Sixth Sense
Woburn Challenge
15
14.8%
3
WC '02 P9 - A Nerd's Preparation
Woburn Challenge
20p
2.9%
3
Detectors
Uncategorized
15p
2.0%
3
ICPC SWERC 2017 B - Table
ICPC
20
44.4%
3
ICPC SWERC 2017 E - Ingredients
ICPC
15
18.0%
3
ICPC SWERC 2017 H - Kabobs
ICPC
35
27.3%
3
IOI '20 P5 - Counting Mushrooms
IOI
35p
2.5%
3
COCI '12 Contest 6 #6 Bakterije
COCI
15
7.7%
3
COCI '11 Contest 5 #5 Blokovi
COCI
20p
16.0%
3
Calendar Contest Problem 4 — Savvyday 29 Oatmeal 94
Seasonal
10
1.0%
3
Matchings
POI
30p
15.6%
3
ICPC NEERC 2014 I - Improvements
ICPC
15
25.0%
3
Baltic OI '11 P5 - Meetings
Baltic OI
25p
8.3%
3
Baltic OI '15 P1 - Bowling
Baltic OI
20p
50.0%
3
COI '16 #1 Ili
COCI
17p
42.9%
3
COI '16 #2 Raspad
COCI
30p
60.0%
3
COI '14 #1 Čvenk
COCI
17p
25.0%
3
A Math Contest P17 - Heatwaves
Uncategorized
45
36.4%
3
APIO '22 P2 - Game
APIO
25p
1.9%
3
Baltic OI '04 P4 - Repeats
Baltic OI
30p
50.0%
3
Yet Another Contest 7 P5 - Egg Dropping
YAC
25p
1.5%
3
Google Code Jam '22 Qualification Round Problem E - Twisty Little Passages
Google Code Jam
20p
57.1%
3
Google Code Jam '08 Round 1A Problem C - Numbers
Google Code Jam
20p
20.0%
3
Google Code Jam '09 Round 1A Problem A - Multi-base happiness
Google Code Jam
12p
40.0%
3
Google Code Jam '09 Round 1A Problem C - Collecting Cards
Google Code Jam
10p
60.0%
3
Google Code Jam '10 Qualification Round Problem C - Theme Park
Google Code Jam
10p
40.0%
3
Google Code Jam '10 Round 1A Problem B - Make it Smooth
Google Code Jam
10p
15.0%
3
Google Code Jam '10 Round 1A Problem C - Number Game
Google Code Jam
20p
75.0%
3
Google Code Jam '11 Qualification Round Problem A - Bot Trust
Google Code Jam
5
57.1%
3
Google Code Jam '11 Qualification Round Problem C - Magicka
Google Code Jam
5p
42.9%
3
Google Code Jam '11 Round 1A Problem A - FreeCell Statistics
Google Code Jam
5p
44.4%
3
Google Code Jam '12 Qualification Round Problem B - Dancing With the Googlers
Google Code Jam
5p
30.8%
3
Google Code Jam '14 Qualification Round Problem B - Cookie Clicker Alpha
Google Code Jam
5p
57.1%
3
Google Code Jam '15 Qualification Round Problem D - Ominous Omino
Google Code Jam
12p
14.3%
3
Google Code Jam '15 Round 1A Problem A - Mushroom Monster
Google Code Jam
5p
60.0%
3
Google Code Jam '15 Round 1A Problem B - Haircut
Google Code Jam
7p
37.5%
3
Google Code Jam '17 Round 1A Problem B - Ratatouille
Google Code Jam
12
66.7%
3
Google Code Jam '18 Round 1A Problem C - Edgy Baking
Google Code Jam
17p
27.3%
3
Google Code Jam '19 Round 1A Problem C - Alien Rhyme
Google Code Jam
12p
60.0%
3
Google Code Jam '21 Qualification Round Problem E - Cheating Detection
Google Code Jam
15p
15.0%
3
Google Code Jam '22 Round 2 Problem B - Pixelated Circle
Google Code Jam
25p
60.0%
3
Google Code Jam '22 Round 2 Problem C - Saving the Jelly
Google Code Jam
30p
41.7%
3
«
1
2
...
94
95
96
97
98
99
100
»